Embodied carbon dioxide in concrete: Variation with common mix design parameters

By P. Purnell, L. Black. 2012

136 citations recorded by the source corpus.

Abstract The transition towards a low-carbon infrastructure requires an understanding of the embodied carbon (eCO 2 ) associated with concrete. However, much current work on eCO 2 underestimates the complexity of its relationship with concrete mix design. This paper demonstrates how eCO 2 of concrete is not a simple function of strength. Rather, for a given strength, considerable eCO 2 savings can be made by careful attention to basic mix design. Replacement of cement with PFA (pulverised fuel ash) can achieve considerable savings; additionally, using a concrete of lower workability, employing a superplasticiser, using crushed rather than rounded aggregate and using a higher strength of cement can have comparably significant effects. The analysis is presented in terms of embodied carbon per unit strength; this shows that there is an optimum strength for all concretes (with regard to minimising eCO 2 per unit of structural performance) of between 50 and 70 MPa.

Subfields: Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/42f10f8dc2b06bfbd287241d3c50a4fbbd3e36da

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